Electrically-controlled feed mechanism.



B. M. W. HANSON. ELEOTRICALLY ooNTRoLLED FEED MBGHANISM.

APPLIDATIONIILED MAB.. 11, 1908.

Patented Mar. 16, 1909.

y B. M. W. HANsoN. ELECTRIGALIIY GONTROLLED FEED MEGHANISM.

APPLICATION FILED MAB..11, 1908.

' Patented Mar. 16, 1909.

' ally-Controlled Fee -nate the possi scription wherein UNITED STATES PATENT-ormoni.

BENGT M. Wi HANSAON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A lCORPORATION OF CONNECTICUT.

'ELECTRICALLY-CONTROLLED FEE'D MECHANISM.

Specication of Letters Patent.

Patented Hatch 16, 1909.

, original appiicariom mea February 28,1906, and october 1s, isos, sum No. susana mi 888,884. Divided and this application led latch 11, 1908. Serial No. 420,882.

To all whom it may concern.'

SON, a citizen of theV United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Im rovements in Electric- Mechanism, of which the following is a specification. This invention relates toelectrically-controlled feed mechanism, the present application being a division of my coending application Serial No. 303,453 file February 28, 1906 and also of another coending applicaipn6 Serial No. 338,864 filed October 13,

Electrically-controlled feed mechanism in? volving my' invention may be employed with advanta e in a variety of ways from which it will e obvious that I do not limit myself to the use of such mechanism in any particular connection. As a matter of fact some of the features of the invention may be used independently of others.

One of the objects of the invention is to provide mechanism of the character set forth aving means to insure proper electrical connection in the various adjustments of a movable member When'the latter is a of an apparatus in conjunction with w 'ch said mec anism is employed.

. Another objb ct of the 'nvention is to elimiility of the wires or analo ous electrical connections unduly kinking or goulingrany of the parts of such an apparatus. he invention includes other advantaous points which with the foregoing will set forth at length in the follo is 'outlined that em odiment of the mechanism which I have selected for illustration inthe drawings accompanying and forming a part of this specification.

Referring to said drawin s, Figi-gre 1 is a front view of a machine suc as closed in the second of the applications hereinbeforeV mentioned and equip ed with feed controlling mechanism inc uding my invention. Fig. 2 is adetail view of pawl and ratchet mechanism, certain electrical devices coperative therewith and other parts which coact with said pawl and ratchet mechanism. Fig 3 is a transverse view of the feeler mechanism and certain adjunctive devices.` Fig. 4 is a front .view'of a portion of the platen,

art

, initial operation to make metallic socket members, and electrical connections uniting the latter. Fig. 5 is a cross sectional view through one of said socket members, its receivi bushing, -a part of the platen, and a portion of a conductor leading from a plug also shown. Fig. 6 is a like view of another-of said socket -members and the parts that are immediately associated therewith.

The gures are on different scales but like characters refer to like parts -in all the figures of the drawings.

From what has been hereinbefore stated it will be evident that the subject of thev resent invention may be used with utility 1n many .different fields. In practice I have found it of ecial advantage when used in connection with a metal reducing machine as fully shown in Fig. 1 of the drawings and to indicate the intent and purpose of the invention I shallbriefly describe such a machine. The machine shown in said Fig. 1

includes in its make up a chambered base or equivalent foundation member as 2 which is represented as having an extended top on which are suitably formed ways as 3 for the support and reciprocatory travel of a carriage as 4. Upon this carriage is movably mounted ordinarily by a pivotal connection,

va platen or equivalent supporting member as 4 furnished with ways as 5 on which are mounted a head stock as 6 and a tail stock as 7 and between the. centerslof which the work as8 is held. This work may be a bar,

rod-or the like whichis adapted for reduc' tion by a suitable tool such as a grinding wheel 9, the shaft of which is sustained fol` rotation by suitable vbearings on the' transversely movable slide 10. It will be understood that the' too1-orgrindingwheel carrying slide has a movement in the present instance substantially at right angles .to the line of travel of the carri e 4. l

The transversely mova le slide has vtwo periods of operation, the grinding wheel movable therewith being adapted on its a primary or rough dressing or reduction of the work, and there after to make a finishing or finalglress at the conclusion of which the transverse advanctermined point thereof the grinding wheel feeding movement of the slide is arrested,

the parts being so organized that-these three actions occur automatically and in absolute sequence. I will of course describe my invention in connection with the feeding mechanism for the slide the latter including af pawl or equivalent element. At the commencement of o eration of the slide this pawl, which wi be hereinafter described somewhat briefly, has its maximum throw or stroke; at a preselected point this throw is reduced to obtain the finishing dress after which the pawl is thrown out of action to sto the advancing or inward motion of the sli e, the Work at this time being nished.

The mechanisms for reciprocating the carriage 4 and for transversely feeding the slide 10 form in themselves no art of the invention for which reason it'is unnecessary to refer to the same in detail. I might state, however, that the carriage is reciprocated and that when it has reached the limit of its travel in either direction, means coperative with it, put the slide advancing mechanism into operation, the latter being concluded when the awl, constituting one of the elements of t e slide actuating mechanism, is

disengaged from its coperating ratchet. The only part of the mechanism for reciprocating the carriage 4 is shown in Fi 1, and that is the hand Wheel 11, the sha t 12 of which is supported by suitable bearingson the framing of the machine. The power-actuated means for obtaining the function just alluded to, are not represented in the drawlugs- On the carriage-4 are, dogs as 13 and 14- which are adapted to alternately engage the rocker 15 to throw the mechanism for advancing the slide 10 into action. The means for thus advancing said slide comprehends in its make-up a ratchet-wheel as 16 and a pawl as 17 and the latter` is the part which in the present instance is governed to' attain the results to which I have hereinbefore referred. I do not deem it necessary to fully describe the connections between said ratchet wheel 16 and the slide 10; they may as Well `be' clear of any desirable nature. On the shaft 18 of the ratchet Wheel 16, there is loosely su ported for oscillation or vibration, a paw -carrier as 19, and to the latter said pawl 17 is ivoted or otherwise suitably connected. T ere .said link being connected with suitable and 14. 'I

mechanism on a` rocker as 15 sustained by the bed 2, said rocker bein swung alternately in opposite directions y the dogs 13 e rocker is provided with means for actuating the link 20. It will be assumed that the carriage has practically concluded' its travel toward the right in Fig. 1; at this stage, the dog 13 will strike and then swing the rocker over to the right, during which the mechanism which is operable with said rocker will move the link 20 in an endwise direction to correspondingly shift the awlcarrier 1.9 and necessarily the pawl to o tain a feed movement of the ratchet. I might add that the mechanism which is operable with said rocker is of such a nature that when the rocker is swung in one direction, thepawlcarrier is moved in the vopposite direction, so that when the dog 13 operates the rocker a Working motion of the pawl is accomplished. When the dog 14 acts upon said rocker a backward and ineffective movement of the pawl is the result and .during this period of operation the pawl rides idly over the teeth o its ratchet Wheel. The pawl is normally held toits work or against the teeth of its cooperating wheel preferably in some positive manner 'and a spring as 22 can be emplo ed for this purpose.

l(3711 a bracket as 23 suitably fastened to the bed 2 of the machine, there is attached a magnet as 24 a convenient electricallyoperated device and constitutinl part of a feed or work reducing circuit. n -addition to said magnet there is a second magnet as 25 constituting part of a feed arresting circuit. It will be apparent that when the magnet 24'is energized that the feed of the slide 10 is reduced and that when the magnet 25 is energized the feed of said slide is stopped. The magnet 25 is connected with the pawlcarrier 19. To one pole of the magnet 24 a wire or equivalent connection as 26 is electrically united, while to one pole of the magnet 25 a wire or equivalent connection as 27 is connected. The other poles of said magnets are electrically connected with the metal framing ofthe machine which is utilized in the present case as convenient conducting means. There are therefore two independent circuits each including' as a part thereof the frame-work of the machine. The wire 26 leads to a battery or other source of'electrical energy as 29 while from said battery 29 a wire as 30 leads and has electrical connection with a contact as 31 mounted upon but insulated from, one extremity of the reciprocatory carriage 4. The wire 27 leads .to a batte as 32 from which a wire as 33 extends and 1s connected with a contact as 34 mounted like the contact as31.

On theouter side of the platen there is a line or horizontal row of spaced bores as 36 which receive bushings as 37 'of some elec- Ytrical insulating material such for example of vulcanized rubber. In the bushings are removably fitted socket-members as 38 of metal or other conducting material said socket-members being adapted to removably receive a metallic or other conducting einen plug 1as 39. .It will be understood that the plug 39 can be taken from a .socket .member in which .it .is fitted .and introduced Vinto any other one .of said :socket-members and the advanta e of -this will 'hereinafter appear. The soc et-members38 may. be and preferably are screwthrealed .into their receiving bushings 37. '.lhel-'e'rnay be any desired number of. such socket members. I lhave shown below the bores 36 a second row of bores as 40, pto -receive'bushings 41 into whichare .fitted socket-members as 411 exactly as ljust described. The internal diameters of the irrespective socket members are, however, diderent.l vIn :the socketmembers of the lower 'row A.may be removably fitted a metallic plug o r pin as 42` In the embodiment 'illustrated the 4internal diameters of the u per row ofsocket-members 38 is greater t an that of .the lower row of socket members andthe Ireason for this will be hereinafter set forth.- v-The right terminal socket member 38 is connected Vby a wire as 43 with the contact 34vwhile the c orrespondingl socket-member 41 is connected by a wire as 44 With the `contact 31. The upper socket members 38 maybe connected together in .any suitablemanner for example 'by a` Wire as 45y approximately coextenslve with the platen, while a substantially simi? lar wire as 46 can connect electricallythe lower socket members 41. The .feed .reducing circuit .will therefore include one or more of the socket-members 4.1 while .the feed arresting circuit. will include one -or more of the socket-'members 38,.

- There .is .coperative with the' work -or bar to be :ground what mightbe termed sizing mechanism such as .that vdenoted .in a

general way by 4:7 and said sizing mechanism includes in its 'construction a feeler to be hereinafter described .and a slide as 48 supported for endwise movement on the laten 4 .and adapted =to .be :clamped vin Xed relation thereto by a device as 49. By virtue of the tWo rows of contact imembers which have been .hereinbefore spoken of as :metallic socket .members I provide .for thepro er electrical connection .of devices on thes ide 48 with the batteries l'29 and 32 throughout the different adjustments .of said slide. In this way I dispense with long free ,feed wires which are in the Way and which vgenerally foul parts of the apparatus.

By employing contact or socket-members g of different sizes, which .in the present `case is accomplished by making them of different internal diameters, there isv no ,possibility of theplugs or pins39 and 42, which alsoiconstitute contact members, being wrongly used. Thelargegpin 39 cannot be inserted into the small socket-members 41 and although the small ,plug or .pincan `be introduced into thelargesocket-members 38,the difference in fit when this occurred would indicate at once to the attendant of the machine, his error.

On the slide 48 there is mounted the freeler-support 50, Which-can be .adjusted 'to- Ward and vfrom the -Work by a vmicrometer saidslide. -The feeler `is denotedby 52 and is represented .as consisting-of an angle ilever pivoted at ornear its angle on the sup ort 50. The short .arm Vof said .feeler is iliusagainst the circumferenceof .the work. ,Y The long arm ofthe feelery has a suf'licient preponderance of weight with respect y'to .the short arm as to descend as the grinding progresses due as will be obvious to a reduction mencement of operation the support 50 will have been so'manipulated as Ito bring the. feelerelement yproper or the pin-52 directly against the periphery -of thecvork. As the reducing operationrogresses the long arm of the fceler lever fa ls, this motion continuing .until the closing :of the first or .feed reducing circuit, the-point .at which :this occurs being regulable. for example bya screw as 53 tapped through the tail of the feeler lever 52. The screw 53 cooperates with a lever as 54 pivotally mounted 'between itsends on the support 50. At its outer endvsaid lever 54 is provided with a single .pointed Jpin -as .55. The inner arm -orbranch ofthe second lever 54 has a preponderance of Weight with respect to the outer arm lthereof or .that which directly supports the single pointed `pin 55, whereby v.the upper fiat -or bluntend of said 'm 55 `.will Vbe normally held against the ower-end of the screw 53. The support 50 .third lever 56 which is-mounted and operates precisely like thesecondlever. The lever 56 is ,provided .at its outer end with .a .double pointed pin as 57 .insulated therefrom and the up er point of which is lnormally in contact with the lower pointed .end ofthe in 55. The `double pointed pin 57- is electrical ycon nected by a wire as .58 with the upper plug 39. .It will be assumed .that the latter has been inserted into one ofits-.coacting socketmembers 38 and .that the .machine is Iin action with -all its parts in- :correct position. Asthe grinding progressesthe stock or work is .reduced in diameter and .when the requi @site reduction in size'thereof has .been obtained, the screw 53 will have forced the outer-branch of the lever l54.downward a sufficient distance, due to the dropping of the longer outer arm of the lever 52, as to-projcct the single pointed pin 55against the upper pointed 'end of the double .pointed pin 57, therebyclosing the primary-or feed reducing circuit and of course energizing the magnet. i 24 .to reducethcstroke of tliepawlcarrier .19 i as will hereinafter appear.- f The'several lescrewas 51 mountedon a bearingicarriedby tratedas furnished with a pin 52( `to engage in the diameter of the Work. At the com-y pivotally carries below. the second -lever 54, a

versl'to which allusion has just been made, may if desired be incased in a housing or shell as 59 on the support 50.

^ A pin as 60 is passed through the housing or` shell 59, is insulated therefrom and is electrically connected by a wire or equivalent conductor as 61 with the plug or contactl member 42 which it will be understood is inserted into one of the socket-members 41. v

It will be assumed that the feed reducing circuit has been closed and it of course follows that the magnet 24 is energized. The grinding of the stock of course continues beyond this point andthe outer long arm of the feeler lever 52 continues to descend. At the proper point said outer arm presses the corresponding arms of the levers 54 and 56 downward and presses the lower end of the double pointed pin or contact 57 against the upper end of the pin 60 thereby closing the second or feed-arresting or stopping circuit and naturally energizing the magnet 25.

` The maximum throw of the pawl 17 is governed by a stop as 62 which may consist or a screw tap ed through a lu as 63 on the bracket 23, t -e upper end o the stop or screw 62 being engaged by the pawl'carrier 19 when at the limit of its back or outward stroke. The screw as will be evident presents an adjustable stop. There is shown as pivoted to said bracket a lever as 64 which is provided with an ad'ustable stop 65 and which consists prefera ly of a screw tap edf through a lug as 66 on said lever 64. he latter is represented as provided with the armature 67 of said magnet 24 which armature is normally held out of contact with the said magnet by a spring as 68. The ad`ustable stop is therefore normally hel out of the ath of movement of the pawl-carrier by sai s ring 68 which is represented as being of t e coil type and as connected with the bracket 23 and lever 64 respectively. W hen the ma net 24 is energized in the manner hereinbe ore described, it attracts its armature 67, the result being that the lever 64 is swung inward and the ad'ustable stop 65 is carried into the ath o the paWl-carrier 19 by virtue of whic the stroke of said pawl-carrier 19 and necessarily that of the pawl is limited or restricted whereby the feed ofthe slide 10 is reduced. After this occurs the upper or feed-stopping ma net 25 is energize in the manner previously set forth. The armature 68for the upper magnet 25 is suitably united to the tail of the pawl 17. When said magnet 25 is energized 1t attracts its armature and lifts the point of the pawl 17 out of engagement with the teeth ofb the ratchet wheel 16 and thereby at once stops or arrests the inward feed of the slide.

To the paWl-'carrier 19 is suitably fastened the lower end of a spring-latch as 69. When the pawl 17 is thrown out of action in the manner indicated the' upper working end of said spring-latch is snapped over thetail of the pawl 17 and thereby positively and with certainty holds the prawl out of engagement with its wheel 16. o release the pawl the latch is swung outwardly.

The operation of the machine will be clearly a parent from the foregoing description. 'I excarriage 4 is-reciprocated, and at a predetermined point the slide 10 is automatically set into action. Durin the inward motion of the slide two electric circuits are successively closed, to cause first a' reduced feed movement of the slide and subseuently an arrest of such feed movement.

. t might be stated that in my claims when I mention the element carriage Iwish to includ" as a part thereof the platen which it will be remembered is carried by said carriage and constitutes in effect a part thereof. What I claim is:

1. The combination of a work-carriage, a tool-carriage, mechanism for controlling the feed of one of said carriages, comprising a plurality of electric circuits each circuit havmg a .contact member and also having aseries of socket-members all the socket members of each series being of uniform internal diameter and the internal diameter of one of said series being different from that of the other of said series, one of said contact. members being adapted to interchangeably fit one of said series of socket-members and the other contact member being adapted to interchangeably iit the other lseries of socketmembers.

2. The combination of a reducing tool, a work-holder the work sup orted by which is acted upon by said tool, e ectrical means for governing the amount of reduction of the work by said tool,- comprising a circuit hav- A ing a plurality of contact members and also aving a contact, a feeler for engaging the work, an adjustable device for supporting said feeler and to which said contact is connectedfor movement therewith,v said contact bein adapted to engage said contact members 1n the different adjusted positions of said adjustable device, l and circuit-controlling means governed by said feeler.

. 3. 'lhe combination of a work-holder, a reducin tool to act against the work supported y said holder, electrical means for governing the amount of reduction of the work by said tool, comprising a circuit having relatively fixed electrical connections and also having a contact, a feeler for engaging the work, an adjustable device for supporting Y said feeler and to which-said contact is connected for movement therewith said contact being adapted to engage said electrical connections at different laces in the adjustmentof said adjustabiie device, and circuitcontrolling means governed by said feeler.

4. The combination of` a work-holder,` a

a (pair 0f I a justable device for'movement therewith,

- two series of electrically connected relatively sockets, and circuit-controlllng means gov- 10, v5 The combination of a work-holder, a

` reducm ported y said holder,

` the combination of a base, a work-su porting rovided with'a feeler for` enga P wiring a ab e sockets s aced from each other and adapted sockets of each series being of uniform inter- 20 f sockets being dierent from that of the other, oneof said plugs being adapted to .in- .terchang'eably iit one series of conducting st'ick'e'st'members msulated therefrom, a conductor connecting socket members, a work-reducin SUPP device movable toward and from the work, a

Anedu'cin tool to act against the'work su-pported ysaidholder, anadjustable device the work,

connected by wire id adjustevice, a row oi electrically connected to intere angeably receive said plug, an electric circuit including said lug, wire and erned by the feeler.

` tool to -act against the worksupan adjustable device. provided with afeeler for engaging thework,

plugs connected by wires with said fixed sockets-spaced from each other, theA nal diameter and the diameter of one series of series of sockets and the other plug being adapted to interchangeably iit the other series, and two electric circuits includiiigv respectively said plugs, their wires and sai sockets.

6; Ina mechanism of theclass described,

carriage Vmovable thereon, provide with a said A device, a. ortlng member for said wor reducing sizing device movable on said ,carriage and comprising a `movab1efeeler,a contact cop- -prising a fee eratlve with said feeler, and a plug electrlcconnected with said contact and adapted to enter anyone of said socket members.

7. a mechanism of the class described, the combination of a work-supporting carriage, a series of contact members disposed in a row along said carriage, va. sizing Adevice shiftably su ported by said carriage, comwith the last mntioned contact, movably mounted and adapted to coperate with any one of the row of contact members.

A8. In a mechanism of the class described, the combination of a base, a work-su porting carriage movable on said base, and aving a series of conducting socket-members insu- .lated therefrom, a conductor connecting said tor connecting said socket mem ers, a Workreducin device, afeeler governed by the work, and fee reducing and arresting circuits con# er, a contact coperatlve with Asaid feeler, and another ,contact coperatlve trolled by said feeler, e'ach circuit including a separate'series of said socket-members and ap ropriateplugs removably fitted therein.

n testimony whereof I- aiiix my signature in presence of two witnesses. l

BENGT M. W. HANSON. Viitnesses: l `W. M. S'roans,

H. W. KILBOUBNE. 

